Svp aide moi je suis bloque aide qui peut me aide svp merci de avance une exoplanète est une planete qui tourne d'une autre etoile que le solei. Cette planete ne diffuse pas assez de lumiere our etre detctee depuis le terre . Pour dectecter sa presence on messure la lumiere envoyee pas de l'etoile autour de laquelle elle tourne
a quel nom port le phenomene ou l'exoplanete l'etoile et la terre sont alignes.
b comment evalue la luminosite de l'etoile quand une exoplanete passe devant
c quelle information peut on avoir sur l'exoplanete en se servant de cette technique

Multiple choice. choose the one alternative that best completes the statement or answers the question. 1) if the force on an object is in the negative direction, the work it does on the object must be 1) a) negative. b) positive. c) the work could be either positive or negative, depending on the direction the object moves. 2) a truck has four times the mass of a car and is moving with twice the speed of the car. if kt and kc refer to the kinetic energies of truck and car respectively, it is correct to say that 2) a) kt = 16kc . b) kt = 1 2 kc. c) kt = kc . d) kt = 2kc . e) kt = 4kc . 3) you and your friend, who weighs the same as you, want to go to the top of the eiffel tower. your friend takes the elevator straight up. you decide to walk up the spiral stairway, taking longer to do so. compare the gravitational